Greetings,
This is going to sound really dumb...
I have a SimpleBean that has two properties property1 and property2. I also
have two rules each matching one of the properties.
When one of the properties changes, both rules fire even though only one
pattern has a reference to the changed property slot.
Has Jess always worked this way or has this behavior changed recently?
Thanks in advance!
alan
********************************
Rules:
(clear all)
(watch all)
(defclass simple SimpleBean)
(defrule print-property1
(simple (property1 ?prop))
=>
(printout t "property1 = " ?prop crlf)
)
(defrule print-property2
(simple (property2 ?prop))
=>
(printout t "property2 = " ?prop crlf)
)
(bind ?instance (new SimpleBean))
(definstance simple ?instance)
(run)
(call ?instance setProperty1 "hello")
(run)
(call ?instance setProperty2 "world")
(run)
(call ?instance setProperty2 "123")
(run)
Sample output:
Jess> (batch c:/jess/jess61a3/main.jess)
MAIN::print-property1: +1+1+t
MAIN::print-property2: =1=1+t
==> f-0 (MAIN::simple (class <External-Address:java.lang.Class>) (property1
nil) (property2 nil) (OBJECT <External-Address:SimpleBean>))
==> Activation: MAIN::print-property1 : f-0
==> Activation: MAIN::print-property2 : f-0
FIRE 1 MAIN::print-property1 f-0
property1 = nil
FIRE 2 MAIN::print-property2 f-0
property2 = nil
<== f-0 (MAIN::simple (class <External-Address:java.lang.Class>) (property1
nil) (property2 nil) (OBJECT <External-Address:SimpleBean>))
==> f-0 (MAIN::simple (class <External-Address:java.lang.Class>) (property1
"hello") (property2 nil) (OBJECT <External-Address:SimpleBean>))
==> Activation: MAIN::print-property1 : f-0
==> Activation: MAIN::print-property2 : f-0
FIRE 1 MAIN::print-property1 f-0
property1 = hello
FIRE 2 MAIN::print-property2 f-0
property2 = nil
<== f-0 (MAIN::simple (class <External-Address:java.lang.Class>) (property1
"hello") (property2 nil) (OBJECT <External-Address:SimpleBean>))
==> f-0 (MAIN::simple (class <External-Address:java.lang.Class>) (property1
"hello") (property2 "world") (OBJECT <External-Address:SimpleBean>))
==> Activation: MAIN::print-property1 : f-0
==> Activation: MAIN::print-property2 : f-0
FIRE 1 MAIN::print-property1 f-0
property1 = hello
FIRE 2 MAIN::print-property2 f-0
property2 = world
<== f-0 (MAIN::simple (class <External-Address:java.lang.Class>) (property1
"hello") (property2 "world") (OBJECT <External-Address:SimpleBean>))
==> f-0 (MAIN::simple (class <External-Address:java.lang.Class>) (property1
"hello") (property2 "123") (OBJECT <External-Address:SimpleBean>))
==> Activation: MAIN::print-property1 : f-0
==> Activation: MAIN::print-property2 : f-0
FIRE 1 MAIN::print-property1 f-0
property1 = hello
FIRE 2 MAIN::print-property2 f-0
property2 = 123
2
SimpleBean class:
/*
* SimpleBean.java
*
* Created on August 13, 2002, 2:52 PM
*/
import java.beans.*;
/**
*
* @author amoore
*/
public class SimpleBean extends Object implements java.io.Serializable
{
private static final String PROP_PROPERTY_1 = "Property1";
private String property1;
private static final String PROP_PROPERTY_2 = "Property2";
private String property2;
private PropertyChangeSupport propertySupport;
/** Creates new SimpleBean */
public SimpleBean ()
{
propertySupport = new PropertyChangeSupport ( this );
}
public String getProperty1()
{
return property1;
}
public void setProperty1 (String value)
{
String oldValue = property1;
property1 = value;
propertySupport.firePropertyChange (PROP_PROPERTY_1, oldValue,
property1);
}
public String getProperty2()
{
return property2;
}
public void setProperty2 (String value)
{
String oldValue = property2;
property2 = value;
propertySupport.firePropertyChange (PROP_PROPERTY_2, oldValue,
property2);
}
public void addPropertyChangeListener (PropertyChangeListener listener)
{
propertySupport.addPropertyChangeListener (listener);
}
public void removePropertyChangeListener (PropertyChangeListener
listener)
{
propertySupport.removePropertyChangeListener (listener);
}
}
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